FCH News

1/2 Square Nuts

Square Nuts are just four-sided nuts, but compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening. Square nuts are typically mated with square-headed bolts.

161 results, (click on any line for more information)

Buy Square Nuts from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
JacksonMSSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13nc 18-8 304 square nut22
    Contact_Supplier
AmericanNYSquare NutSteelPlain1/2-13square nut10
    Contact_Supplier
MAINSOURCNHSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 ss10
    Contact_Supplier
AmericanNYSquare NutSteelZinc/Clear1/2-13square nut zp650
    Contact_Supplier
AbabaCASquare NutSteelPlain1/2-131/2-13 sq nut stl pln b18.2.2726
    Contact_Supplier
AbabaCASquare NutSteelPlain1/2-131/2-13 sq nut stl pln b18.2.2100
    Contact_Supplier
AbabaCASquare NutSteelZinc/Clear1/2-131/2-13 sq nut stl znc b18.2.2200
    Contact_Supplier
YANKEENHSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut (13/16 wd x 7/16 ht) 18-8 stainless steel24
    Contact_Supplier
WeaverWASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 ss106
    Contact_Supplier
WeaverWASquare NutSteelZinc/Clear1/2-131/2-13 square nut zinc1140
    Contact_Supplier
JET FITTINGCASquare NutGrade 2Zinc/Clear1/2-13nut square 1/2-13 grade 2 steel zinc plated b18.2.2200
    Contact_Supplier
ExpressCASquare NutSteelZinc/Clear1/2-131/2-13 square nuts zinc250
    Contact_Supplier
AmericanNYSquare NutSteelCadmium/Yellow1/2-13square nut nylon patch cad140
    Contact_Supplier
AmericanNYSquare NutSteelGalvanized1/2-13square nut hot dipped500
    Contact_Supplier
B & K FASTPASquare NutSteelPlain1/2-131/2-13 heavy square nuts plain b18.2.2131
    Contact_Supplier
B & K FASTPASquare NutSteelPlain1/2-131/2-13 square nuts plain b18.2.21583
    Contact_Supplier
B & K FASTPASquare NutSteelZinc/Clear1/2-131/2-13 square nuts zinc b18.2.230
    Contact_Supplier
TSFTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/16 x 7/16square nut ss 1/2-13x13/16x7/1675
    Contact_Supplier
TSFTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/16 x 7/16square nut ss 1/2-13x13/16x7/1675
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 square nut plain b18.2.240
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 square nut plain b18.2.23000
    Contact_Supplier
QFCTXSquare NutGrade 5Plain1/2-131/2-13 hvy square nut grade 5 plain b18.2.236
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 sq nut overtapped .021 plain b18.2.2490
    Contact_Supplier
QFCTXSquare NutSteelGalvanized1/2-131/2-13 square nut galvanized b18.2.2746
    Contact_Supplier
QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s b18.2.25935
    Contact_Supplier
QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s b18.2.2386
    Contact_Supplier
QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s domestic b18.2.2230
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain b18.2.21150
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain finish domestic b18.2.221
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain finish domestic b18.2.22
    Contact_Supplier
QFCTXSquare NutSteelPlain1/2-131/2-13 square nut tapped oversize plain finish domestic b18.2.2272
    Contact_Supplier
QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.212440
    Contact_Supplier
QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.2343
    Contact_Supplier
QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.28728
    Contact_Supplier
QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.2116165
    Contact_Supplier
QFCTXSquare NutSteelGalvanized1/2-13 x .0181/2-13 square nut hdg .018 o/s 100% domestic b18.2.270000
    Contact_Supplier
QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/161/2-13x13/16(.81)af square nut 18-8 100% domestic b18.2.21187
    Contact_Supplier
QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/161/2-13x13/16(.81)af square nut 18-8 100% domestic b18.2.2595
    Contact_Supplier
QFCTXSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 x 13/161/2-13x13/16(.81)af square nut 18-8 100% domestic b18.2.2258
    Contact_Supplier
METRO INDOHSquare NutSteelZinc/Clear1/2-13square nut uss490
    Contact_Supplier
TSFTXSquare NutSteelZinc/Clear1/2-13square nut zinc 1/2-131500
    Contact_Supplier
ACCURATEILSquare NutSteelZinc/Clear1/2-13square nut regular1447
    Contact_Supplier
HewesNYSquare NutSteelPlain1/2-13sqr nut finish638
    Contact_Supplier
MESAFASTCASquare NutSteelZinc/Clear1/2-13square nut106.0
    Contact_Supplier
HBBOLTCASquare NutSteelPlain1/2-13square nut w/convex cut top1
    Contact_Supplier
EndriesWISquare NutSteelZinc/Clear1/2-131/2-13 square nut zinc3450
    Contact_Supplier
Wurth AdaMNSquare NutGrade 2Zinc/Clear1/2-13nut sq grade 2 (zn) 1/2-1324,751
    Contact_Supplier
GLFOHSquare NutSteelPlain1/2-131/2-13 hvy square nut stl pln b18.2.2 () ()210
    Contact_Supplier
GLFOHSquare NutSteelGalvanized1/2-131/2-13 square nut stl hdg b18.2.2 () ()2755
    Contact_Supplier
THRDFASTFLSquare NutSteelZinc/Clear1/2-13square nut b18.2.239
    Contact_Supplier
CIFILSquare NutSteelPlain1/2-13 x 1.251/2-13 square nutx1.25 across flats and 0.17 thick steel plain (514) (514) (502) ()502
    Contact_Supplier
CIFILSquare NutSteelGalvanized1/2-13 x 1.251/2-13 square nutx1.25 across flats and 0.31 thick steel mechanical galvinized (22817) (22817) (22819) ()22819
    Contact_Supplier
SISAZSquare NutSteelGalvanized1/2-131/2-13 square nut steel hot dip galv9516
    Contact_Supplier
SISAZSquare NutSteelPlain1/2-131/2-13 square nut steel plain300
    Contact_Supplier
AmericanNYSquare NutSteelZinc/Clear1/2-13square nut zp200
    Contact_Supplier
THRDFASTFLSquare NutSteelZinc/Clear1/2-13square nut b18.2.271
    Contact_Supplier
THRDFASTFLSquare NutSteelGalvanized1/2-13square nut hdg b18.2.259
    Contact_Supplier
NAPPCOTXSquare NutSteelZinc/Clear1/2-13square nut steel zinc 1/2-13 (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD)) (160-NUTS (STANDARD))502
    Contact_Supplier
THRDFASTTNSquare NutSteelZinc/Clear1/2-13square nut b18.2.2964
    Contact_Supplier
THRDFASTTNSquare NutSteelPlain1/2-13square nut b18.2.250
    Contact_Supplier
IRFNJSquare NutSteelPlain1/2-13reg square nut stl5177
    Contact_Supplier
IRFNJSquare NutSteelPlain1/2-13reg square nut stl5177
    Contact_Supplier
IRFNJSquare NutSteelPlain1/2-13reg square nut stl5177
    Contact_Supplier
IRFNJSquare NutSteelPlain1/2-13reg square nut stl1,177
    Contact_Supplier
IRFNJSquare NutSteelPlain1/2-13reg square nut stl5177
    Contact_Supplier
IRFNJSquare NutSteelPlain1/2-13reg square nut stl5177
    Contact_Supplier
SeattleNBWASquare NutBrassPlain1/2-13square nut307
    Contact_Supplier
LippinCASquare NutSteelZinc/Clear1/2-131/2-13 square nut zinc1950
    Contact_Supplier
MESAFASTCASquare NutSteelPlain1/2-13 square nut steel plain125.0
    Contact_Supplier
SRFALSquare NutGrade 5Plain1/2-13heavy square nut-
    Contact_Supplier
BoltCraftNESquare NutSteelPlain1/2-13 x 7501/2-13 square nut plain 750/ctninquire
    Contact_Supplier
BoltCraftNESquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut gr 18.8 stainless steelinquire
    Contact_Supplier
EndriesWISquare NutSteelPlain1/2-131/2-13 heavy square nut plain400
    Contact_Supplier
NutsBoltsNESquare NutSteelZinc/Clear1/2-131/2-13 square nut zp664
    Contact_Supplier
Cal FastenrsCASquare NutSteelGalvanized1/2-13square nut square nut992
    Contact_Supplier
StandardMASquare Nut316, 317, A4 StainlessPlain1/2-131/2-13 square nut 316 stainless steel b18.2.216640
    Contact_Supplier
StandardMASquare NutBrassPlain1/2-131/2-13 square nut brass b18.2.28350
    Contact_Supplier
Future FastenerTXSquare NutSteelZinc/Clear1/2-131/2-13 square nut plt350
    Contact_Supplier
Future FastenerTXSquare NutSteelBlack Oxide1/2-131/2-13 square nut blk350
    Contact_Supplier
OBRIENOHSquare NutSteelGalvanized1/2-13square nut100
    Contact_Supplier
DeltaTXSquare NutSteelPlain1/2-13fin square nut plain 1/2-131324
    Contact_Supplier
DeltaTXSquare NutSteelZinc/Clear1/2-13fin square nut zinc 1/2-13440
    Contact_Supplier
DeltaTXSquare NutSteelGalvanized1/2-13fin square nut stl hdg 1/2-13250
    Contact_Supplier
DeltaTXSquare NutSteelPlain1/2-13hvy square nut plain 1/2-13295
    Contact_Supplier
THRDFASTALSquare NutSteelPlain1/2-13square nut b18.2.246
    Contact_Supplier
SWACOOHSquare NutSteelPlain1/2-131/2-13 heavy square nut steel plain163
    Contact_Supplier
CNBILSquare NutGrade 2Plain1/2-13square nut, ,863
    Contact_Supplier
CNBILSquare NutGrade 2Plain1/2-13heavy pattern square nut, ,500
    Contact_Supplier
FMPMASquare NutSteelPlain1/2-13square bolt nut65
    Contact_Supplier
FMPMASquare NutSteelZinc/Clear1/2-13square bolt nut580
    Contact_Supplier
WDMBIASquare NutBrassPlain1/2-13nut sq brs (pl) 1/2-13 (W0X0)300
    Contact_Supplier
WDMBIASquare NutGrade 2Zinc/Clear1/2-13nut sq gr2 (zn) 1/2-13750
    Contact_Supplier
BHAMALSquare NutSteelPlain1/2-131/2-13 reg. square nuts b18.2.285
    Contact_Supplier
ASFCORPMISquare NutGrade 2Zinc/Clear1/2-131/2-13 hvy sq nut sae j995 gr 2 tri zn fe/zn 5an406
    Contact_Supplier
ZAL INDUSCASquare NutSteelGalvanized1/2-131/2-13 square nut h.d.g.2,250
    Contact_Supplier
ZAL INDUSCASquare NutSteelPlain1/2-131/2-13 heavy square nuts380
    Contact_Supplier
ZAL INDUSCASquare NutSteelZinc/Clear1/2-131/2-13 square nut pltd34
    Contact_Supplier
KomarOHSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 regular square nut (13/16 x 7/16) 304 ss830
    Contact_Supplier
FastWareSaskSquare NutSteelZinc/Clear1/2-13nc square nut300
    Contact_Supplier
ASMCILSquare NutGrade 2Zinc/Clear1/2-13coarse gr2 regular square nut low carb zp631
    Contact_Supplier
ASMCILSquare NutGrade 2Plain1/2-13coarse gr2 regular square nut low carb191
    Contact_Supplier
ASMCILSquare NutGrade 2Galvanized1/2-13coarse gr2 regular square nut low carb hdg84
    Contact_Supplier
KBSTNSquare NutSilicon BronzePlain1/2-131/2-13 regular squarenut sili brze b18.2.2446
    Contact_Supplier
KBSTNSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 regular squarenut s/s b18.2.21,182
    Contact_Supplier
KBSTNSquare NutBrassPlain1/2-131/2-13 regular squarenut brass b18.2.22,986
    Contact_Supplier
MAINSOURCNHSquare NutSteelPlain1/2-13square nut stl z/clr250
    Contact_Supplier
MAINSOURCNHSquare NutSteelPlain1/2-13square nut stl394
    Contact_Supplier
Kanebridge ILSquare NutSteelGalvanized1/2-131/2-13 regular square nut hot dipped galvanized7.500
    Contact_Supplier
Kanebridge ILSquare NutSteelPlain1/2-131/2-13 heavy square nut plain7.500
    Contact_Supplier
Kanebridge ILSquare NutSteelZinc/Clear1/2-131/2-13 regular square nut zinc7.500
    Contact_Supplier
LibertyILSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13regular square nut 18-8 s/s 18-8 s/s611
    Contact_Supplier
LibertyILSquare NutSteelZinc/Yellow1/2-13regular square nut & &166
    Contact_Supplier
HBBOLTCASquare NutSteelZinc/Clear1/2-13square nut1,650
    Contact_Supplier
IPCVASquare NutSteelZinc/Clear1/2-131/2-13 square nut steel zinc550
    Contact_Supplier
General FMISquare NutGrade 2Plain1/2-131/2-13 hvy sq nut gr 2 b18.2.21241
    Contact_Supplier
XL ScrewGASquare NutSteelZinc/Clear1/2-13regular square nuts zp800
    Contact_Supplier
XL ScrewGASquare NutSteelPlain1/2-13regular square nuts800
    Contact_Supplier
PerigeeMISquare NutGrade APlain1/2-13 x 13/16 x 7/161/2-13 x 13/16 x 7/16 regular square nut b18.2.292
    Contact_Supplier
ASMCILSquare NutGrade 5Plain1/2-13coarse gr5 regular square nut med carb171
    Contact_Supplier
LibertyILSquare NutSteelPlain1/2-13regular square nut200
    Contact_Supplier
ASMCILSquare NutGrade 8Plain1/2-13coarse gr8 regular square nut med carb b18.2.221
    Contact_Supplier
HayesCASquare NutSteelPlain1/2-131/2-13 square nut pln107
    Contact_Supplier
Alma BoltMISquare NutSteelPlain1/2-131/2-13 plain finish square nut b18.2.22467
    Contact_Supplier
Fastener OHSquare NutGrade 2Zinc/Clear1/2-13square nut 1/2-13 gr2 zinc plated 500
    Contact_Supplier
NAPPCOTXSquare NutSteelZinc/Clear1/2-13square nut steel zinc 1/2-13502
    Contact_Supplier
OSSCORISquare NutSteelZinc/Clear1/2-131/2-13 square nut plated b18.2.297
    Contact_Supplier
Valley NuWASquare NutSteelPlain1/2-13nc square nut pl297
    Contact_Supplier
Fastener OHSquare Nut316, 317, A4 StainlessPlainsquare nut 1/2-13 316 ss100
    Contact_Supplier
HodellOHSquare NutSteelGalvanized1/2-131/2-13 square nut hdg305
    Contact_Supplier
JET FITTINGCASquare NutSteelPlain1/2-131/2-13 heavy square nut steel plain 50NQHP b18.2.2163
    Contact_Supplier
HodellOHSquare NutSteelGalvanized1/2-131/2-13 heavy square nut hot dipped galv. ()71
    Contact_Supplier
StandardMASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 s/s steel5000
    Contact_Supplier
HodellOHSquare NutSteelGalvanized1/2-131/2-13 square nut mech galv185
    Contact_Supplier
HodellOHSquare NutSteelZinc/Clear1/2-131/2-13 reg square nut zinc400
    Contact_Supplier
HodellOHSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 30450
    Contact_Supplier
THRDFASTMSSquare NutSteelGalvanized1/2-13square nut hdg b18.2.225
    Contact_Supplier
THRDFASTALSquare NutSteelPlain1/2-13square nut b18.2.210
    Contact_Supplier
HodellOHSquare NutSteelZinc/Clear1/2-131/2-13 regular square n ut zinc400
    Contact_Supplier
OlanderCASquare NutSteelZinc/Clear1/2-13 sq nut stl zn non-rohs115
    Contact_Supplier
HodellOHSquare NutSteelPlain1/2-131/2-13 reg square nut pln1400
    Contact_Supplier
HodellOHSquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-131/2-13 square nut 18-8 30450
    Contact_Supplier
Valley NuWASquare NutSteelGalvanized1/2-13nc square nut hdg1031
    Contact_Supplier
HodellOHSquare NutSteelGalvanized1/2-131/2-13 square nut h.d.galv 50cnsqg ()5
    Contact_Supplier
Alma BoltMISquare NutSteelZinc/Clear1/2-13square nut4081
    Contact_Supplier
HodellOHSquare NutSteelGalvanized1/2-131/2-13 square nut mech galv185
    Contact_Supplier
HodellOHSquare NutSteelGalvanized1/2-131/2-13 square nut hdg ()5
    Contact_Supplier
Fastener OHSquare NutGrade 2Plain1/2-13square nut 1/2-13 gr2 steel plain 350
    Contact_Supplier
JacksonMSSquare NutSteelZinc/Clear1/2nc square nut906
    Contact_Supplier
B & K FASTPASquare Nut300 Stainless (A1,A2, 18-8,304,310 etc.)Plain1/2-13 11/161/2-13 square nuts stainless 11/16 thk b18.2.24325
    Contact_Supplier
QFCTXSquare NutSteelZinc/Clear1/21/2nc bzp square nut b18.2.2354
    Contact_Supplier
QFCTXSquare NutSteelZinc/Clear1/21/2nc bzp square nut b18.2.2800
    Contact_Supplier
QFCTXSquare NutSteelZinc/Clear1/21/2nc bzp square nut b18.2.2155
    Contact_Supplier
QFCTXSquare NutSteelZinc/Clear1/21/2nc bzp square nut b18.2.217
    Contact_Supplier
MastBoltOHSquare NutGrade 5Plain1/2 x 2 1/2button hd oval neck with 1-1/4 thread w/square nuts
    Contact_Supplier
JacksonMSSquare NutSteelGalvanized1/2nc square nut hdg1522
    Contact_Supplier
JacksonMSSquare NutSteelPlain1/2nc square nut455
    Contact_Supplier
MastBoltOHSquare NutGrade 5Plain1/2 x 2 1/2button hd oval neck with 1-1/4 thread w/square nuts
    Contact_Supplier
XL ScrewGASquare NutSteelGalvanized1/2-13 .018 o.s.regular square nuts hdg800
    Contact_Supplier
General FMISquare NutSteelZinc/Clear1/21/2 sq nut w/handle clr zn gm4345m b18.2.250850
    Contact_Supplier

Trademarks identified with products listed on this website are the property of their respective owners, not FastenersClearingHouse.com.